Quadbeam sensors are used in a wide range of industries and processes, including pulp and paper, sugar, starch, paint, chemical processes, and rendering. Improved process control plus long-term reliability equals less down-time and reduced costs. The multi-beam ratio-metric system self-compensates for contamination and ageing sensors. S series sensors are manufactured from a polymer block, eliminating vulnerable glass and the chance of leakage. Simple multi-point calibration means sensors can be calibrated on-site against meaningful site standards and site lab equipment.